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National Stock Number:
5305-01-348-8440
Federal Supply Class:
5305
National Item Identification Number:
013488440
Description:
SCREW,EXTERNALLY RELIEVED BODY
Detail:
An externally threaded fastener whose threaded portion is of one nominal diameter, and whose unthreaded portion has been machined or ground in one or more places or over its entire length to a maximum diameter less than the minimum pitch diameter of the thread (excludes undercut for thread relief). It is No. 0 (0.060 IN.) (1.5 mm) or larger, and is designed to be held or driven with either a wrench or inserted driver (excluding internal socket and multiple spline types) or both in sizes below No. 10 (0.190 IN.) (5 mm) and larger sizes must have a head designed for any type inserted driver (excluding internal socket and multiple spline types) but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. See also BOLT, EXTERNALLY RELIEVED BODY and BOLT, INTERNAL WRENCHING.
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Manufacturer Information:
| 1377337-3 | 87557 | LOCKHEED CORP LOCKHEED ELECTRONICS CO INC | | 1377337-3 | 94117 | BAE SYSTEMS INFORMATION AND ELECTRONIC SYSTEMS INTEGRATION INC. |
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Techincal Specification:
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.060 INCHES NOMINAL | | DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER | 0.460 INCHES NOMINAL | | EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 2 | | FASTENER LENGTH | 0.640 INCHES NOMINAL | | FIRST DIAMETER FROM HEAD | 0.164 INCHES NOMINAL | | HEAD DIAMETER | 0.306 INCHES MINIMUM AND 0.322 INCHES MAXIMUM | | HEAD HEIGHT | 0.105 INCHES MINIMUM AND 0.115 INCHES MAXIMUM | | HEAD STYLE | PAN | | INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 | | MATERIAL | STEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 302B OR STEEL COMP 305 OR STEEL COMP 303SE OR STEEL COMP 304 OR STEEL COMP 304L OR STEEL COMP 308 OR STEEL COMP 309 OR STEEL COMP 309S OR STEEL COMP 310 OR STEEL COMP 310S OR STEEL COMP 314 OR STEEL COMP 316 OR STEEL COMP 316L OR STEEL COMP 317 OR STEEL COMP 321 OR STEEL COMP 347 OR STEEL COMP 348 OR STEEL COMP 384 OR STEEL COMP 385 OVERALL | | NOMINAL THREAD DIAMETER | 0.164 INCHES | | SECOND DIAMETER FROM HEAD | 0.120 INCHES NOMINAL | | SURFACE TREATMENT | PASSIVATE OVERALL | | THREAD LENGTH | 0.240 INCHES NOMINAL | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD SERIES DESIGNATOR | UNC | | THREAD QUANTITY PER INCH | 32 |
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